CN103995511A - Intelligent bus body control system with CAN bus - Google Patents
Intelligent bus body control system with CAN bus Download PDFInfo
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- CN103995511A CN103995511A CN201410208768.8A CN201410208768A CN103995511A CN 103995511 A CN103995511 A CN 103995511A CN 201410208768 A CN201410208768 A CN 201410208768A CN 103995511 A CN103995511 A CN 103995511A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses an intelligent bus body control system with a CAN bus. The intelligent bus body control system comprises a digitalization instrument and a plurality of universal modules, and the digitalization instrument is connected with the universal modules through the internal CAN bus. The digitalization instrument is used for collecting partial bus body switch signals, receiving data sent by all the universal modules, conducting logic operation on the signals and data to obtain control commands and sending the control commands to all the universal modules; each universal module is used for acquiring bus body signals, transmitting the bus body signals and executing control commands of the bus body signals. According to the intelligent bus body control system with the CAN bus, bus body control is achieved; by sending bus body state data in real time, a remote server can be connected to a bus mounted machine through GPRS, the current driving state of a bus is known and recorded in time, and thus remote monitoring is achieved.
Description
Technical field
The present invention relates to vehicle electric field, refer to especially a kind of intelligent bus CAN bus car body control system.
Background technology
(the Controller Area Network of CANShi controller local area network, CAN) abbreviation, being to develop by researching and developing and produce the famous German BOSCH company of automobile electronics, and finally becoming international standard (ISO11898), is one of most widely used fieldbus in the world.In North America and West Europe, CAN bus protocol has become the STD bus of Computer Controlled System for Vehicle and built-in industrial control area net（CAN）, and has and take CAN and aim at the J1939 agreement of high capacity waggon and heavy industry motor vehicles and machines design as underlying protocol.CAN belongs to the category of fieldbus, and it is the distributed control of a kind of effective support or the real-time serial communication network of controlling.The dcs building based on R line than many RS-485, the dcs based on CAN bus all has obvious superiority in all fields.
CAN bus has adopted how main competitive mode bus structure, has the operation of many main websites and disperses the universal serial bus of arbitration and the feature of broadcast communication.In CAN bus, arbitrary node can be at any time sends information and regardless of primary and secondary, therefore can between each node, realize free communication to other node on network on one's own initiative.And utilize RS-485, RS-232 can only form primary and secondary structure system, and communication mode also can only carry out in the mode of main website poll, and real-time, the reliability of system are poor.
Development along with urban public transport, increasing bus is put in daily operation, supervise and safeguard that the bus of One's name is legion becomes the problem that administrative authority need to solve, and current bus status data transmission is main, adopt artificial hand-held set to carry out data acquisition and parameter setting, have the shortcoming that workload is large, data lag behind.
Summary of the invention
In view of this, the object of the invention is to propose a kind of providing and can realize Body Control and can realize again the intelligent bus CAN bus car body control system communicating with far-end server, thereby for realizing vehicle management department, the information system management of the bus of One's name is legion is provided support.
Based on above-mentioned purpose a kind of intelligent bus CAN bus car body control system provided by the invention, comprising: a digital instrumentation and a plurality of general module, described digital instrumentation is connected with general module by inner CAN bus;
Described digital instrumentation, for gathering local vehicle body switching signal and receiving the data that each general module sends, and by the controlled order after logical operation of all signal datas, then control command is sent to each general module;
Described general module, for gathering vehicle body signal and transmission vehicle body signal, simultaneously for carrying out the control command of vehicle body signal.
In certain embodiments, described digital instrumentation is connected with described vehicle-mounted machine by outside CAN bus, and described vehicle-mounted machine is carried out radio communication by GPRS and described far-end server, realizes far-end server and communicates by letter with the two-way transmission between digital instrumentation.
In certain embodiments, described two-way communication is that far-end server sends data message to digital instrumentation, and described digital instrumentation sends key parameter data message to described far-end server simultaneously; The data message that described far-end server sends to digital instrumentation comprises configuration information, time calibration information and presence information whether; Transmission condition in described configuration information comprises that timed sending or set a distance send, the distance interval when time interval when transmission interval in described configuration information comprises timed sending and set a distance send.
In certain embodiments, described outside CAN bus, for carrying out data transmission by self-defining communication protocol, transmission method comprises:
The application data to be sent that partly adds a byte at the id information of frame data;
By multiframe data, form a packet;
Only receiving complete packet and after CRC16 verification is entirely true, can communicate by letter correctly, and responded.
In certain embodiments, described self-defining communication protocol is:
Adopt CAN2.0 agreement, select PeliCAN pattern, use identification code the frame format that is expanded of 29bit;
According to expanding frame format, use one of them byte that forms ID part in CAN2.0 agreement for sending application data, make application data byte number that every frame can transmit be increased to 9 bytes by 8 bytes of routine;
A plurality of Frames are formed to a packet according to frame number;
This packet is with CRC16 checking routine, and data receiver is receiving that a complete bag and verification correctly just need response.
In certain embodiments, described key parameter comprises: unit information, vehicle chassis information, electronic device information and light information, vehicle-mounted machine is set up and communicated by letter with far-end server after receiving key parameter, for remote vehicle management and monitoring.
In certain embodiments, described digital instrumentation is controlled by CPU and is comprised as lower unit:
Switching signal collecting unit, gathers according to distance is far and near the switching signal that stops and starting in local vehicle body operational process, and sends to CPU analyzing and processing;
Analog acquisition unit, for gathering Vehicular accumulator cell voltage signal, after analog digital conversion, analyzes and produces corresponding steering logic by digital instrumentation CPU;
Power signal output unit, for output power, every road power stage with short-circuit detecting, open circuit and detect and heat protection function, and to CPU transmitted power failure message;
Data storage cell, for storing the operational factor of vehicle body, and sends to CPU analyzing and processing.
In certain embodiments, described general module is controlled by CPU and is comprised:
Switching value acquisition module, gathers local vehicle body switching signal, and sends to described digital instrumentation CPU and carry out Treatment Analysis;
Power output module, for output multi-channel power, every road power stage with short-circuit detecting, open circuit and detect and overcurrent protection function, and by inner CAN bus transmission vehicle body abort situation;
Analog acquisition unit for gathering analog signals, sends to instrument after CPU carries out analog digital conversion;
Pulsed quantity collecting unit, for acquisition pulse signal, and sends to instrument by image data.
In certain embodiments, described digital instrumentation also comprises:
Liquid crystal display display unit, for reflecting vehicle body state, by different icons and the various states of word indication vehicle body of liquid crystal display;
LED light array, for coordinate reflection vehicle body state with liquid crystal display display unit, is illuminated or is extinguished indication vehicle body state by LED light;
Indication dial plate, drives pointer rotation indication dial plate by stepper motor, for showing engine speed, the speed of a motor vehicle, Vehicular accumulator cell voltage, water temperature, engine oil pressure, amount of fuel and propons, back axle atmospheric pressure state information;
Buzzer siren, for carry out buzzing warning when vehicle body breaks down, and coordinates with LED light array.
In certain embodiments, described general module comprises anterior waterproof general module and afterbody waterproof general module, the ground state of the mailing address configured port by two modules is realized differentiation, if the mailing address line ground state of two modules is incomplete same, can guarantee that each module has unique mailing address.
In public transport body control system, adopted intelligentized design, can realize Body Control, can carry out data sharing by telecommunication technique and far-end server again, make remote side administration platform can understand and grasp in real time the transport condition of each car, also can be convenient to monitoring and maintenance management according to the historical driving process of recording status data readback, raise the efficiency.
As can be seen from above, intelligent bus CAN bus car body control system provided by the invention is when realizing Body Control, by real-time transmission vehicle body status data, make remote server be connected to vehicle-mounted machine by GPRS, understand in time and record the current driving state of bus, thereby realize the remote monitoring to public transit vehicle.
Accompanying drawing explanation
Fig. 1 is intelligent bus CAN bus car body control system annexation schematic diagram in the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Please refer to Fig. 1, intelligent bus CAN bus car body control system in embodiments of the invention, comprise: a digital instrumentation and a plurality of general module, described digital instrumentation is connected with general module by inner CAN bus, described digital instrumentation, for gathering local vehicle body switching signal and receiving the data that each general module sends, and all signal datas are obtained after logical operation to the control command of each body electric system equipment, again control command is sent to modules, by the break-make of those electric equipments of module controls.
Described general module comprises anterior waterproof general module and afterbody waterproof general module, and the exchange of control command is processed as follows:
Such as the break-make to dipped headlights is controlled, described digital instrumentation collects after dipped headlights switching signal, the status signal of this switching signal and power component BTS840 corresponding to the dipped headlights from anterior waterproof general module that receives from inner CAN bus is combined to calculating steering logic, the status signal of power component BTS840 comprises whether there is short circuit, open circuit or overheated abnormal occurrence, when only closed at dipped headlights switch and all normal these conditions of corresponding power component BTS840 state all meet, just can calculate the steering logic result of dipped headlights for opening, otherwise, by the steering logic result that calculates dipped headlights for closing.Similarly, can calculate the steering logic of all body electric systems.
Afterwards, digital instrumentation forms Frame by the steering logic packing of the body electric system in anterior waterproof general module administrative area, by inner CAN bus, send to anterior waterproof general module, anterior waterproof general module receives after inner CAN bus data, according to inner CAN bus communication protocol, parse the steering logic about dipped headlights, if steering logic is for opening, open the control port of the upper corresponding dipped headlights of CPU, by power component BTS840 conducting corresponding to dipped headlights, making vehicle power be connected to dipped headlights is also its power supply, light dipped headlights, if steering logic is for closing, process is contrary, close dipped headlights.Meanwhile, anterior waterproof general module is the state of the power component BTS840 monitoring, comprise whether exist open circuit, the information of short circuit and the phenomenon such as overheated, by inner CAN bus, send to digital instrumentation, so that instrument is calculated steering logic next time.Similarly, can realize the control to other body electric system equipment.
Described digital instrumentation sends to the control command of anterior waterproof general module to comprise: the break-make of left and right dipped headlights, left and right high beam, left and right front fog lamp, wiper speed shelves, water spray motor, hummer, station reporting instrument power supply, Qianmen courtesy lamps, roof clearance lamps, vehicle-mounted machine power supply, 3G video and GPS device power supply (DPS) etc.
Described digital instrumentation sends to the control command of afterbody waterproof general module to comprise: the break-make of power supply, back door switch power supply, pass, back door power supply, starter power etc. is closed at engine power supply, exsiccator, TV power supply, left and right Rear Fog Lamp, lampet, electric horn, left and right turn signal, brake lamp, backup lamp, Qianmen switch power supply, Qianmen.
Described general module, for gathering vehicle body signal and transmission vehicle body signal, simultaneously for carrying out the control command of vehicle body signal.
This digital instrumentation is mainly used in receiving the data that each general module sends, the status signal data that gather together with self, after logical operation, control command is formed to Frame, by inner CAN bus, send to modules, realize the break-make of each power interface is controlled.
This digital instrumentation is the control center of body control system, possess the functions such as Parameter storage, steering logic calculating, the communication of two CAN channel bus (the CAN communication interface A being connected with outside CAN bus and the CAN communication interface B being connected with inner CAN bus), button parameters, LED light array, buzzer warning, the indication of key parameter pointer-type, the multi-functional demonstration of color LCD screen, personalized Software for Design is carried out in visual concrete technical requirement simultaneously, realizes abundanter data processing, transmission and Presentation Function.
And waterproof general module is as the performance element of collection, transmission and the control command of vehicle body signal, there is switch acquisition, analog acquisition, pulsed quantity collection, power stage, mailing address configuration and CAN communication function.
It is below the detailed description of the concepts such as switch amount collection, analog acquisition, pulsed quantity collection.
Switching value: generally refer to the state of the "on" and "off" of contact, generally also can represent with " 0 " or " 1 " state of switching value in computer equipment.Switching value is divided into active switch amount signal and passive switch amount signal, the state that active switch amount signal refers to "on" and "off" is the signal of charged, specialty call is the rank signal that jumps, can be understood as pulsed quantity, general have signals such as 220VAC, 110VAC, 24VDC, 12VDC, the signal of charged not when passive switch amount signal refers to " opening " and "off" state, is generally referred to as again dry contact.The resis tance method of surveying is resistance 0 or infinity.
Analog quantity: the concept of analog quantity is corresponding with digital quantity, but after quantizing, can be converted into digital quantity again.Analog quantity is on T/A, to be all continuous physical quantity, and the signal of its expression is simulating signal.Analog quantity any one value in continuous change procedure is all a concrete significant physical quantity, as temperature, and voltage, electric current etc.Analog quantity is exactly T/A continually varying physical quantity in certain process, due in actual application, all instrument and equipments have a sampling period for the collection of extraneous data, the data of its collection only just have change when the next sampling period starts, and in the sampling period, its numerical value does not change with the variation of analog quantity.
Pulsed quantity: pulsed quantity is exactly that transient voltage or electric current are jumped to the semaphore of another value by a certain value.After quantification, it changes lasting regular is exactly digital quantity, if it becomes a certain fixed value and remain unchanged by 0, it is exactly switching value.
In the present embodiment, further, described digital instrumentation is connected with described vehicle-mounted machine by outside CAN bus, described vehicle-mounted machine is carried out radio communication by GPRS and described far-end server again, realize far-end server and communicate by letter with the two-way transmission between instrument, and then realize the remote monitoring of far-end server to public transit vehicle.
Described two-way communication comprises that far-end server sends data message to digital instrumentation, and described digital instrumentation sends key parameter data message to described far-end server simultaneously.The information that described far-end server sends to digital instrumentation comprises transmission condition and sends the configuration informations such as interval, time calibration information and presence information whether.Described transmission condition comprises that timed sending or set a distance send, distance interval when time interval when described transmission interval comprises timed sending and set a distance send.Comprise calibration year, month, day, hour, min, second information described time calibration.Described status information comprises that whether server is online and whether data receiver is correct.
The key parameter that described digital instrumentation sends comprises:
1, accumulated distance, accumulative total oil consumption;
2, unit information: comprise that whether machine oil is normal, whether water temperature is normal, whether generator normally works, whether engine normally works;
3, vehicle chassis information: whether retarder is normal, whether centralized lubrication is normal, whether brake unclamps, whether throttle unclamps, whether heating installation work is normal, whether Qianmen is closed, whether back door is closed;
4, electronic device information: whether the power supply of IC-card vehicle-mounted machine is normal, whether the power supply of 3G video monitoring is normal, whether station reporting instrument power supply is normal, whether the power supply of advertisement TV is normal, whether electronic stop plate power supply is normal, whether the power supply of GPS equipment is normal;
5, light information: whether headlight work is normal, whether lampet work is normal, steering indicating light is working properly, whether Fog-proof light work is normal, whether brake lamp work is normal, whether backup lamp work is normal, whether courtesy light work is normal.
Digital instrumentation is connected and communicates by letter with waterproof universal control module by self inner CAN bus interface, by outside CAN bus interface, be connected with equipment such as vehicle-mounted machine simultaneously, and carry out data transmission by self-defining communication protocol, increase frame data Content of Communication, vehicle-mounted machine transfers data to far-end server by GPRS again, simultaneously, far-end server also can be passed to instrument by handshaking information and configuration information by vehicle-mounted machine, realize the remote monitoring of server to public transit vehicle, article two, CAN bus works alone, reduced the load factor of single bus, improve the reliability of communication.Wherein, digital instrumentation also sends to vehicle-mounted machine by key parameter by outside CAN bus timing, and vehicle-mounted machine sends to far-end server by GPRS again, the remote monitoring of convenient service device to vehicle.
In the present embodiment, optional, described outside CAN bus, for carrying out data transmission by self-defining communication protocol, carries out data transmission according to increasing frame data Content of Communication.
Outside CAN bus is for carrying out data transmission by self-defining communication protocol, the application data to be sent that partly adds a byte at the id information of frame data, and can form a packet by multiframe data, only receiving complete packet and after CRC16 verification is entirely true, just thinking that communication correctly, is responded.
Described self-defining communication protocol is:
1, use CAN2.0 agreement, select PeliCAN pattern, use the identification code of 29bit, i.e. Extended Superframe Format;
2, use in CAN2.0 agreement, form ID part one of them byte for sending application data, make application data byte number that every frame can transmit be increased to 9 bytes by 8 bytes of routine;
3, a plurality of Frames form a packet according to frame number;
4, data band CRC16 verification, take over party only receives that a complete bag and verification correctly just need response.This agreement is that the both sides that receive and send are suitable for, be that instrument and vehicle-mounted machine are all processed by this agreement, as long as in accepting state, just need identification whether to receive a complete packet, after only having verification, prove complete packet, just receive and process, so do error-disable function stronger.
In the present embodiment, optional, described digital instrumentation is controlled by CPU and is comprised as lower unit:
Switching signal collecting unit, the region division principle according to being connected nearby with instrument installation site, gathers the switching signal that stops and starting in local vehicle body operational process, and carries out analyzing and processing by CPU.Switching signal collecting unit adopts MC33884, can gather altogether 48 way switch amounts, comprises that 8 tunnels are just controlled, 16 tunnels are able to programme, the negative control in 24 tunnels switch input signal, and power stage adopts BTS840, altogether exportable 10 tunnels.
Analog acquisition unit, for gathering Vehicular accumulator cell voltage signal, after analog-digital conversion, analyzes and produces corresponding steering logic by digital instrumentation CPU;
Power signal output unit, for output power, every road power stage with short-circuit detecting, open circuit and detect and heat protection function, and to CPU transmitted power failure message;
Data storage cell, for storing the operational factor of vehicle body, and sends to CPU analyzing and processing.
This digital instrumentation adopts 16 single-chip microcomputers as its CPU, has switching signal collecting unit, collection of simulant signal unit, power signal output unit, SPI communication unit, two-way CAN communication unit and data storage cell, liquid crystal display display unit, LED light array, stepper motor drive pointer rotation indication dial plate etc.
SPI communication unit refers to, SPI communication unit is the switching signal that collects for read switch chip of CPU and sends control command to stepper motor.
In the present embodiment, optional, described general module is controlled by CPU and is comprised:
Switching value acquisition module, according to the region division principle that is connected with general module installation site, gathers local vehicle body switching signal nearby, and by CAN bus, sends to described digital instrumentation CPU and carry out Treatment Analysis;
Power output module, for output multi-channel power, every road power stage with short-circuit detecting, open circuit and detect and overcurrent protection function, and by inner CAN bus transmission vehicle body abort situation;
Analog acquisition unit, be used for gathering analog signals, each module provides 4 road analog acquisition inputs and 2 road pulse collection inputs, can realize the collection of the signals such as amount of fuel, water tank water temperature, engine oil pressure, propons and back axle gas bomb air pressure to being distributed in vehicle body diverse location.
Pulsed quantity collecting unit, for gathering vehicle speed pulse signal, and sends to CPU and carries out Treatment Analysis.
General module is generally waterproof general module, adopts 8 single-chip microcomputers as its CPU, and module provides 12 way switch amount inputs, adopts MC33972 to realize; 18 road power stages are also provided, wherein export 10 road 100W power, adopt BTS840; 8 road 50W power stages, adopt BTS724, every road power stage to be all with to open circuit, short-circuit detecting and heat protection function; and by CAN bus, send abort situation, be convenient to localization of fault and maintenance.
To all switching signals on vehicle body, according to acquisition module installation site apart from distance, according to the principle connecting, carry out region division nearby, by digital instrumentation and general module, gather different switching signals, such as signals such as instrument to collect wiper speed shelves, front-end structure gathers the signals such as front door switch, completes switching signal collection.Instrument oneself gathers, and adds the switching information that upper module is sent by CAN bus, knows all switching informations.To power signal, be also the same, instrument can be responsible for the output of indivedual power nearby, such as lampet, dipped headlights etc.; Front-end structure is responsible for switch Qianmen, and rear module is responsible for controlling rear portion light etc.
In the present embodiment, optional, described digital instrumentation also comprises:
Liquid crystal display display unit, for reflecting vehicle body state, by the different icons on liquid crystal display and word indication vehicle body state;
LED light array, for coordinate reflection vehicle body state with liquid crystal display display unit, is illuminated or is extinguished indication vehicle body state by LED light;
Stepper motor drives pointer rotation indication dial plate, that CPU process is to status informations such as obtained engine speed, the speed of a motor vehicle, Vehicular accumulator cell voltage, water temperature, engine oil pressure, amount of fuel and propons, back axle air pressure, the current state value obtaining after computing respectively, by SPI Driving Stepping Motor rotation respective angles, on scale dial plate, indicate respective value, be convenient to direct visualization;
Buzzer siren, for carry out buzzing warning when vehicle body breaks down, and coordinates with LED light array.
Digital instrumentation is human-computer interaction interface, the information of collecting is carried out after analyzing and processing, except outbound data communication, the Status icons such as left and right turn signal, parking braking, skidding, front and back door can be illuminated by LED lamp array in inside, reflection vehicle body state.
By SPI communication unit, control 8 stepper motors, drive pointer rotation indication engine speed, car speed, Vehicular accumulator cell voltage, engine oil pressure, water temperature, amount of fuel, front-rear axle atmospheric pressure value.
Colored liquid crystal display display unit, include but not limited to each Status icons, motor instant fuel consumption values, average fuel consumption value, vehicle single mileage and accumulative mileage, current time, vehicle trouble information etc., and can carry out page turning demonstration by button, simultaneously, by button, can also realize different functions at the different pages: at display page, the page turning that can realize demonstration information by page-turning button shows, by multipage, shows abundant car status information, is convenient to inquiry and localization of fault; At the set of time page, can carry out setting and the storage on time, date; In parameter, the page is set, the key parameters such as vehicle bridge reduction gear ratio storage can be set, be convenient to calculate the speed of a motor vehicle and accumulative mileage, make instrument can be applicable to easily the vehicle of different vehicle bridge speed ratios.
In the present embodiment, optionally, described general module comprises anterior waterproof general module and afterbody waterproof general module, ground state by external connection bundle on the mailing address configured port of modules is realized differentiation, as long as the mailing address line ground state of modules is incomplete same, can realizes each module and have unique mailing address.Anterior waterproof general module and afterbody waterproof general module are crossed the opening circuit of the status signal collecting separately and power device, short circuit information exchange inner CAN bus and are sent to digital instrumentation.The quantity of described general module unrestricted, according to vehicle body semaphore number can increase or reduce at vehicle body quantity is installed.
To sum up, the data that in the present embodiment, digital instrumentation sends for gathering local vehicle body switching signal and each general module of reception, and by the controlled order after logical operation of all signal datas, then control command is sent to each general module, digital instrumentation is connected and communicates by letter with waterproof universal control module by self inner CAN bus interface, by outside CAN bus interface, be connected with equipment such as vehicle-mounted machine simultaneously, and carry out data transmission by self-defining communication protocol, increase frame data Content of Communication, vehicle-mounted machine transfers data to far-end server by GPRS again, simultaneously, far-end server also can be passed to instrument by handshaking information and configuration information by vehicle-mounted machine, realize the remote monitoring of server to public transit vehicle, article two, CAN bus works alone, reduced the load factor of single bus, improve the reliability of communication.
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an intelligent bus CAN bus car body control system, is characterized in that, comprising: a digital instrumentation and a plurality of general module, and described digital instrumentation is connected with general module by inner CAN bus;
Described digital instrumentation, for gathering local vehicle body switching signal and receiving the data that each general module sends, and by the controlled order after logical operation of all signal datas, then control command is sent to each general module;
Described general module, for gathering vehicle body signal and transmission vehicle body signal, simultaneously for carrying out the control command of vehicle body signal.
2. intelligent bus CAN bus car body control system according to claim 1, it is characterized in that, described digital instrumentation is connected with described vehicle-mounted machine by outside CAN bus, described vehicle-mounted machine is carried out radio communication by GPRS and described far-end server, realizes far-end server and communicates by letter with the two-way transmission between digital instrumentation.
3. intelligent bus CAN bus car body control system according to claim 2, it is characterized in that, described two-way communication is that far-end server sends data message to digital instrumentation, and described digital instrumentation sends key parameter data message to described far-end server simultaneously; The data message that described far-end server sends to digital instrumentation comprises configuration information, time calibration information and presence information whether; Transmission condition in described configuration information comprises that timed sending or set a distance send, the distance interval when time interval when transmission interval in described configuration information comprises timed sending and set a distance send.
4. intelligent bus CAN bus car body control system according to claim 2, is characterized in that, described outside CAN bus, and for carrying out data transmission by self-defining communication protocol, transmission method comprises:
The application data to be sent that partly adds a byte at the id information of frame data;
By multiframe data, form a packet;
Only receiving complete packet and after CRC16 verification is entirely true, can communicate by letter correctly, and responded.
5. intelligent bus CAN bus car body control system according to claim 4, is characterized in that, described self-defining communication protocol is:
Adopt CAN2.0 agreement, select PeliCAN pattern, use identification code the frame format that is expanded of 29bit;
According to expanding frame format, use one of them byte that forms ID part in CAN2.0 agreement for sending application data, make application data byte number that every frame can transmit be increased to 9 bytes by 8 bytes of routine;
A plurality of Frames are formed to a packet according to frame number;
This packet is with CRC16 checking routine, and data receiver is receiving that a complete bag and verification correctly just need response.
6. intelligent bus CAN bus car body control system according to claim 3, it is characterized in that, described key parameter comprises: unit information, vehicle chassis information, electronic device information and light information, vehicle-mounted machine is set up and is communicated by letter with far-end server after receiving key parameter, for remote vehicle management and monitoring.
7. intelligent bus CAN bus car body control system according to claim 1, is characterized in that, described digital instrumentation is controlled by CPU and comprised as lower unit:
Switching signal collecting unit, gathers according to distance is far and near the switching signal that stops and starting in local vehicle body operational process, and sends to CPU analyzing and processing;
Analog acquisition unit, for gathering Vehicular accumulator cell voltage signal, after analog digital conversion, analyzes and produces corresponding steering logic by digital instrumentation CPU;
Power signal output unit, for output power, every road power stage with short-circuit detecting, open circuit and detect and heat protection function, and to CPU transmitted power failure message;
Data storage cell, for storing the operational factor of vehicle body, and sends to CPU analyzing and processing.
8. intelligent bus CAN bus car body control system according to claim 1, is characterized in that, described general module is controlled by CPU and comprised:
Switching value acquisition module, gathers local vehicle body switching signal, and sends to described digital instrumentation CPU and carry out Treatment Analysis;
Power output module, for output multi-channel power, every road power stage with short-circuit detecting, open circuit and detect and overcurrent protection function, and by inner CAN bus transmission vehicle body abort situation;
Analog acquisition unit for gathering analog signals, sends to instrument after CPU carries out analog digital conversion;
Pulsed quantity collecting unit, for acquisition pulse signal, and sends to instrument by image data.
9. intelligent bus CAN bus car body control system according to claim 1, is characterized in that, described digital instrumentation also comprises:
Liquid crystal display display unit, for reflecting vehicle body state, by different icons and the various states of word indication vehicle body of liquid crystal display;
LED light array, for coordinate reflection vehicle body state with liquid crystal display display unit, is illuminated or is extinguished indication vehicle body state by LED light;
Indication dial plate, drives pointer rotation indication dial plate by stepper motor, for showing engine speed, the speed of a motor vehicle, Vehicular accumulator cell voltage, water temperature, engine oil pressure, amount of fuel and propons, back axle atmospheric pressure state information;
Buzzer siren, for carry out buzzing warning when vehicle body breaks down, and coordinates with LED light array.
10. intelligent bus CAN bus car body control system according to claim 1, it is characterized in that, described general module comprises anterior waterproof general module and afterbody waterproof general module, the ground state of the mailing address configured port by two modules is realized differentiation, if the mailing address line ground state of two modules is incomplete same, can guarantee that each module has unique mailing address.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404271A (en) * | 2015-10-28 | 2016-03-16 | 浙江中科正方电子技术有限公司 | Centralized body control system and identity early warning method thereof |
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| CN106569452A (en) * | 2016-11-04 | 2017-04-19 | 无锡市普欧电子有限公司 | Bus air conditioning system based on CAN control |
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| CN105937700A (en) * | 2016-06-30 | 2016-09-14 | 金龙联合汽车工业（苏州）有限公司 | Centralization lubrication integrated control method |
| CN106569452A (en) * | 2016-11-04 | 2017-04-19 | 无锡市普欧电子有限公司 | Bus air conditioning system based on CAN control |
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| CN110597049A (en) * | 2019-09-27 | 2019-12-20 | 北京和利时系统工程有限公司 | Safety output circuit and control and detection method |
| CN112109644A (en) * | 2020-09-11 | 2020-12-22 | 中国第一汽车股份有限公司 | Vehicle control method, device, equipment and storage medium |
| CN112109644B (en) * | 2020-09-11 | 2022-03-04 | 中国第一汽车股份有限公司 | Vehicle control method, device, equipment and storage medium |
| CN113323542A (en) * | 2021-05-21 | 2021-08-31 | 南京康尼机电股份有限公司 | Bus door intelligent control system |
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| CN103995511B (en) | 2016-10-05 |
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Effective date of registration: 20200618 Address after: 100076 Beijing, Fengtai District, South Road, No. 1, Patentee after: BEIJING INSTITUTE OF SPACE LAUNCH TECHNOLOGY Address before: 4003, room 2, building 17, South Yongchang Road, Beijing economic and Technological Development Zone, Beijing, Daxing District 100076, China Patentee before: AEROSPACE NEW LONG MARCH ELECTRIC VEHICLE TECHNOLOGY Co.,Ltd. |